Overview
The UCC2806DWTRG4 is a low-power, dual-output, current-mode PWM (Pulse Width Modulation) controller produced by Texas Instruments. This device is part of the UCC3806 family, known for its improved performance and familiar architecture, similar to the UC3846 series. It is designed for a wide range of applications, including off-line power supplies and battery-operated portable equipment, due to its low startup current and well-defined voltage threshold for turn-on.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Temperature Range | --40°C to 85°C | |
| Startup Current | Typical startup current | 50 μA |
| Switching Frequency | Maximum switching frequency capability | Up to 1 MHz |
| Output Drive Capability | Dual high-current MOSFET driving outputs | 0.5 A each |
| Power Supply Rejection Ratio (PSRR) | Line range = 10 V to 15 V, load range = 0.2 mA to 5 mA | 56 dB |
| Voltage Reference | Trimmed reference output | 5.1 V ±1% |
| Package Type | 16-SOIC |
Key Features
- Dual high-current, MOSFET driving outputs with inherent anti-parallel body diodes to clamp voltage swings to the supply rails.
- Fast current sense loop for enhanced device versatility.
- Low output impedance, 2-MHz operational error amplifier.
- Internally current limited error amplifier to allow zero duty cycle by externally forcing COMP to GND.
- 3× differential current sense amplifier for precise current sensing.
- Bi-directional SYNC pin for external synchronization with TTL compatible thresholds.
- Low bias current and high switching frequency capability.
- Multiple package options for both through-hole and surface mount applications.
Applications
- Off-line power supplies.
- Battery-operated portable equipment.
- DC-DC converters.
- Power factor correction (PFC) circuits.
- High-efficiency power supplies requiring current mode control.
Q & A
- What is the operating temperature range of the UCC2806DWTRG4?
The operating temperature range is --40°C to 85°C.
- What is the typical startup current of the UCC2806DWTRG4?
The typical startup current is 50 μA.
- What is the maximum switching frequency capability of the UCC2806DWTRG4?
The maximum switching frequency capability is up to 1 MHz.
- What type of output drive does the UCC2806DWTRG4 have?
The UCC2806DWTRG4 has dual high-current MOSFET driving outputs.
- What is the power supply rejection ratio (PSRR) of the UCC2806DWTRG4?
The PSRR is 56 dB.
- What is the voltage reference output of the UCC2806DWTRG4?
The voltage reference output is 5.1 V ±1%.
- In what package type is the UCC2806DWTRG4 available?
The UCC2806DWTRG4 is available in a 16-SOIC package.
- What are some common applications of the UCC2806DWTRG4?
Common applications include off-line power supplies, battery-operated portable equipment, DC-DC converters, and power factor correction (PFC) circuits.
- How does the SYNC pin function in the UCC2806DWTRG4?
The SYNC pin is bi-directional, allowing for external synchronization with TTL compatible thresholds.
- What is the significance of the error amplifier in the UCC2806DWTRG4?
The error amplifier is a low output impedance, 2-MHz operational amplifier that allows sinking or sourcing of current at the COMP pin and is internally current limited.
